Porterville Weather in September

What's the weather like in Porterville (California) in September 2025?

The climate in Porterville during September can be summarized as hot and very dry.

September is in the fall / autumn in Porterville and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a comfortable 32°C (90°F), whilst at night 15°C (58°F) is normal.

Porterville weather averages (imperial / metric)
Daytime temperature 32.4°C 90.2°F
Nightly temperature 14.7°C 58.4°F
Average temperature 23.5°C 74.3°F
Daily sunshine 11.7 hrs
Avg rainfall 8 mm 0.3 ins
Rainy days 1 days
Sea temperature 16.8°C 62.3°F
Humidity 46%
Windspeed 11.2kph 7 mph

On average September is the 4th driest month of the year in Porterville with around 8mm 0.3 inches of rain making it a very dry time to visit.

On the flip side this corresponds to an average of 11.7 hours of sunshine per day.

September temperatures in Porterville

Porterville average temperature in September

September rainfall

Porterville average rain in September

September hourly sunshine

Porterville average rain in September

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Porterville in September 2025.

Other monthly averages

Best places to visit in September

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Porterville weather stats

Porterville weather statistics
Hottest month: July 36.4°C 97.5°F
Driest month: July 1mm 0ins
Sunniest month: July 13.8hrs
Coldest month: December 12.6°C 54.7°F
Wettest month: January 48mm 1.9ins
Map showing location of Porterville (36.06523, -119.01677) Porterville map pin © Google

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